Transmission mode selection for serving a user equipment in a d-mimo network

A centralized node for selecting transmission mode for access points (APs) to serve a user equipment in a distributed multiple input multiple output (D-MIMO) network, wherein each of the APs comprises at least one radio transceiver chain, the centralized node comprising processing circuitry the processing circuitry being configured to cause the centralized node to:

• obtain information of calibration status defining whether the radio transceiver chains per each pair of the APs are mutually calibrated or not;
• obtain channel characteristics of a propagation channel between each of the APs and the user equipment;
• obtain reception capability information pertaining to how many data streams the user equipment is capable of simultaneously receiving;
• select the transmission mode for at least one subset of the APs as a function of the calibration status per each pair of the APs, the channel characteristics, and the reception capability information, wherein the transmission mode at least defines how the antennas of the subset of the APs are to be used for serving the user equipment;
• and
• provide instructions to the subset of the APs of the selected transmission mode to be used when serving the user equipment.

A non-transitory computer readable medium storing instructions for selecting transmission mode for access points (APs) to serve a user equipment in a distributed multiple input multiple output (D-MIMO) network, wherein each of the APs comprises at least one radio transceiver chain, the instructions being executable by processing circuitry of a centralized node, whereby the centralized node is caused to:

• obtain information of calibration status defining whether the radio transceiver chains per each pair of the APs are mutually calibrated or not;
• obtain channel characteristics of a propagation channel between each of the APs and the user equipment;
• obtain reception capability information pertaining to how many data streams the user equipment is capable of simultaneously receiving;
• select the transmission mode for at least one subset of the APs as a function of the calibration status per each pair of the APs, the channel characteristics, and the reception capability information, wherein the transmission mode at least defines how the antennas of the subset of the APs are to be used for serving the user equipment;
• and
• provide instructions to the subset of the APs of the selected transmission mode to be used when serving the user equipment.